This country was occupied
This country was occupied during the Swedish Deluge, and every legislator had veto power in its parliament, or Sejm [SEY-m]. This country, which the Jagyellon dynasty unified with Lithuania, underwent three partitions by its neighbors, and a shipyard strike led by Lech Walesa in Gdansk started its anti-Communist Solidarity union. For 10 points, name this site of Auschwitz, a country whose invasion by Hitler in September 1939 sparked the Warsaw Ghetto uprising.
This country was occupied during the Swedish Deluge, and every legislator had veto power in its parliament, or Sejm [SEY-m].
{Poland}